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//
// NSCursor+CrossHair.m
// UKPaintView
//
// Created by Uli Kusterer on Mon Nov 03 2003.
// Copyright (c) 2003 M. Uli Kusterer. All rights reserved.
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//

#import "NSCursor+CrossHair.h"


@implementation NSCursor (UKCrossHair)

+(id) crossHairCursor
{
return [self crossHairCursorWithLineSize: NSMakeSize(1,1)];
}


+(id) crossHairCursorWithLineSize: (NSSize)size
{
return [self crossHairCursorWithLineSize: size color: [NSColor blackColor]];
}


+(id) crossHairCursorWithLineSize: (NSSize)size color: (NSColor*)lineColor
{
float desiredSize = ((size.width > size.height)? size.width : size.height) * 5;
if( desiredSize < 16 ) desiredSize = 16;
NSImage* cursorImage = [[[NSImage alloc] initWithSize: NSMakeSize(desiredSize,desiredSize)] autorelease];
NSPoint left = { 0, 0.5 }, right = { 1, 0.5 },
bottom = { 0.5, 0 }, top = { 0.5, 1 };

left.x = truncf(left.x * desiredSize) + 0.5;
left.y = truncf(left.y * desiredSize) + 0.5;
right.x = truncf(right.x * desiredSize) + 0.5;
right.y = truncf(right.y * desiredSize) + 0.5;
bottom.x = truncf(bottom.x * desiredSize) + 0.5;
bottom.y = truncf(bottom.y * desiredSize) + 0.5;
top.x = truncf(top.x * desiredSize) + 0.5;
top.y = truncf(top.y * desiredSize) + 0.5;

if( size.width < 1 ) size.width = 1;
if( size.height < 1 ) size.height = 1;
// size.width = ( size.width >= 16 ) ? 15 : size.width;
// size.height = ( size.height >= 16 ) ? 15 : size.height;

[cursorImage lockFocus];
[lineColor set];
[NSBezierPath setDefaultLineWidth: size.height];
[NSBezierPath strokeLineFromPoint: left toPoint: right];
[NSBezierPath setDefaultLineWidth: size.width];
[NSBezierPath strokeLineFromPoint: top toPoint: bottom];
[cursorImage unlockFocus];

return [[[NSCursor alloc] initWithImage: cursorImage hotSpot: NSMakePoint(bottom.x, left.y)] autorelease];
}

@end
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